Citation: Congwen Sun, Jinhui Hao, Bing Wei, Meng Wu, Hong Liu, Yusong Xiong, Bochen Hu, Longhua Li, Min Chen, Weidong Shi. Cu/CdCO₃ catalysts for efficient electrochemical CO₂ reduction over the wide potential window[J]. Chinese Chemical Letters, ;2023, 34(12): 108520. doi: 10.1016/j.cclet.2023.108520 shu

Cu/CdCO₃ catalysts for efficient electrochemical CO₂ reduction over the wide potential window

Congwen Sun ^a ,
Jinhui Hao ^a ,
Bing Wei ^b ,
Meng Wu ^a ,
Hong Liu ^a ,
Yusong Xiong ^a ,
Bochen Hu ^a ,
Longhua Li ^a ,
Min Chen ^{a, *,} ,
Weidong Shi ^{a, *,}

a.
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
b.
School of Resource and Environmental Engineering, Jilin Institute of Chemical Technology, Jilin 132000, China

chenmin3226@sina.com

swd1978@ujs.edu.cn

Received Date: 28 February 2023
Revised Date: 23 April 2023
Accepted Date: 25 April 2023
Available Online: 28 April 2023

Figures(4)

High efficiency and low-cost catalyst-driven electrocatalytic CO₂ reduction to CO production are of great significance for energy storage and development. The severe competitive hydrogen evolution reaction occurs at large negative potential window limits the achievement of the target product from CO₂ at high efficiency. Here, we successfully prepared Cu_x/CdCO₃ composite catalyst rich in interfaces, in which achieved high CO Faraday efficiency exceeded 90% in a wide potential window of 700 mV and highest value up to 97.9% at −0.90 V vs. RHE. The excellent performance can be ascribed to the positive contribution of Cu_x/CdCO₃, which maintains a suitable high local pH value during electrochemical reduction, thus inhibiting the competitive hydrogen evolution reaction. Moreover, the compact structure between Cu and CdCO₃ ensures fast electron transfer both inside catalysts and interface, thus speeding up the reaction kinetics of CO₂ to CO conversion. Theoretically calculations further prove that the combination of Cu and CdCO₃ provides the well-defined electronic structure for intermediates adsorption, significantly reducing the reaction barrier for the formation of CO. This work provides new insights into the design of efficient electrochemical CO₂ reduction catalysts for inhibiting hydrogen evolution by adjusting the local pH effect.
- OH⁻,
- Local pH,
- Inhibition of hydrogen evolution,
- CO,
- Wide potential window
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沈阳化工大学材料科学与工程学院沈阳 110142

Cu/CdCO3 catalysts for efficient electrochemical CO2 reduction over the wide potential window

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通讯作者: 陈斌, bchen63@163.com

Cu/CdCO₃ catalysts for efficient electrochemical CO₂ reduction over the wide potential window